Machine for making artificial-stone shingles.



G. SIVERTSON & 0. SBGROW. MACHINE FOR MAKING ARTIFICIAL STONE SHINGLES.

APPLICATION FILED NOV. 11, 1912.

1,085,706. Patented Feb. 3, 19 4.

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1,085,706. Patented Feb. 3, 1914.

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O. SIVERTSON & 0. SEGROW.

MACHINE FOR MAKING ARTIFICIAL STONE SHINGLES. APPLICATION FILED NOV.11, 1912.

1,085,706. Patented Feb. 3, 1914.

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CHRIST SIVERTSON AND OLE SEGROW, OF CLOQUET, MINNESOTA.

MACHINE FOR MAKING ARTIFICIAL-STONE SHINGLES/ Specification of Letters Patent.

Patented Feb. 3,1914.

Application filed November 11, 1912. Serial No. 730,758.

To all whom it may concern:

Be it known that we, CHRIsr Srvnnrson and OLE Snonow, citizens of the United States, residing at Oloquet, in the county of Carlton and State of Minnesota, have invented certain new and useful Improvements in Machines for Making Artificial- Stone Shingles; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in machines for making artificial stone shingles and the like.

One object of the invention is to provide a machine of this character by means of which shingles or the like may be quickly and accurately formed from cement or other plastic material and which is provided with means for returning the empty molds to the operator at the inlet end of the machine.

Another object is to provide a machine of this character which will be simple, strong and durable in construction, efficient and rapid in operation and which is well adapted to the purpose for which it is designed.

With these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings; Figure 1 is a side View of the machine showing the position of the knife operating and weight releasing mechanism at the beginning of its forward or working stroke; Fig. 2 is a top plan view of the same; Figs. 3, 4. and 5 are side views of a portion of the machine showing various positions assumed by the knife operating and weight releasing mechanism on its forward stroke; Fig. 6 is a central vertical longitudinal section of the machine showing the position of the parts when the operating mechanism is in the position shown in Fig. 5' and at the end of a working stroke or as when a full mold has been forced from beneath the hopper and an empty mold brought-into place; Fig. 7 is a similar View showing the parts at the end of a return stroke and ready to project the knife and molds and corresponding to the position of the parts shown in Fig. 1; Fig. 8 is a horizontal sectional view taken on the line 8-8 of Fig. 7; Fig. 9 is a vertical cross sectional view taken on the line 99 of Fig.

1; Fig. 10 is a similar view taken on the line 101 O of Fig. 1; Fig. 11 is a detail perspective view of the knife carriage and knife or blade for separating the plastic material in the molds from that in the hopper; Fig. 12 is a similar view of the weight operated plunger frame which projects the molds beneath the hopper; Fig. 13 is a deta l perspective 'view of one of the molds; Fig. 1-1 is an inverted perspective view of the same.

Referring more particularly to the drawings 1 denotes the main frame or table of the machine on which at one side are arranged mold supporting and guiding tracks 2. The tracks 2 are also provided with longltudinal guide grooves 3 which slidably support the knife or blade 4 which, after the molds are filled with plastic material from the hop-per, cuts through and separates the material in the mold from that in the hopper. Secured at a suitable position on the tracks 2 is a hopper 5 adapted to contain the cement or other plastic material from which the shingles are formed. The hopper 5 is shaped in plan or horizontal section to correspond to the shape of themold or to the shape of the shingle formed therein.

[The molds 6 in which the shingles are formed each comprises a plate 7 which is adapted to be engaged with the tracks 2 and on the upper sides of the plate is an upwardly projecting flange 8 which forms the sides of the mold and corresponds in shape to the shape desired for the shingle, said flange being of a height corresponding to the thickness of the shingle to be formed therein. On the inner surfaces of the side flanges 8 of the mold are inwardly extending lugs 9 which are provided to form notches or recesses in the edges of the shingles. On the bottom of the plate 7 at the front end thereof is a centrally disposed beveled notch 10 while in the bottom of the plate at its rear end are formed two beveled notches 11 the purpose of which will be hereinafter described? Arranged at a suitable distance below the center of the space between the tracks 2 is a single plunger supporting and guiding track 12 on which is slidably mounted a weight operated mold projecting plunger frame 18 comprising a bar 141 having in its sides near the bottom thereof longitudinal guide grooves 15 which receive guide flanges 16 arranged on the track 12 as shown. Secured to the bar 14 near its outer end and projecting a slight distance above the same is a cross head 17 the ends of which project beneath and slidably engage the under sides of the track 2 as shown. One end of the cross head 17 is further secured and firmly braced to the bar 14 by a diagonally arranged brace bar 18 and formed on this end of the cross head between the brace and the bar 14 is a depending stop lug 19 which is adapted to be engaged by one end of a detent or stop pawl 20 which is pivotally mounted on one side of the track 12 in position to permit the outer end of the pawl to engage the lug 19 when the plunger frame is in a full retracted position at the end of the return stroke of the plunger thereby holding the latter in a retracted or inoperative position until the detent 20 is disengaged from the lug 19 by a suitable trip mechanism hereinafter described.

On the upper side of the outer end of the plunger bar 14 are upwardly projecting parallel bearing lugs 21 between which is piv-. otally mounted a mold projecting pawl 22 having on its outer end a weight 23 whereby the pawl is swung to and held in an operative position for engaging the molds on the track 2 when the plunger frame is projected. The plunger projecting mechanism comprises a weight 24 which is slidably mount-ed in a casing 25 secured to one end of the frame or table 1. The weight has connected thereto one end of a plunger operating cable 26 which passes upwardly around a guiding pulley 27 and rearwardly beneath the tracks 2 and has its rear end suitably secured to the top of the plunger bar 14 as shown. By thus arranging the weight 24 it will be seen that when the detent 20 is disengaged from the lug 19 on the cross head 17 of the plunger frame, said weight will project the plunger frame and the molds which are engaged by the pawl 22 on the plunger frame in the manner described.

In order to limit the forward movement of the molds when projected in the manner described and to hold the latter in proper position below the hopper 5 we provide a a spring projected stop 28 which comprises a pair of vertically disposed parallel fingers connected at their lower ends and spaced a suitable distance apart by a cross bar 29 which is secured to the forward end of a spring plate 30 the opposite end of which is firmly secured to the lower side of the plunger frame 12. The spring plate 30 is preferably reinforced by a supplemental spring 31 which is secured at its inner end to the track 12 and has its outer end loosely engaged with the spring plate 30 as shown. The fingers of the stop 28 are slidably supported by vertically disposed tubular guides 32 secured to the inner side of the front end of the frame 1 at a suitable position to permit the upper ends of the arms of the stop to project above the mold tracks and thereby stop the molds when projected by the plunger frame and to hold the molds at a proper position below the hopper as clearly shown in Fig. 6 of the drawings.

The stop 28 is retracted at the proper time to permit the filled molds to be projected from beneath the hopper and onto a table 33 at the discharge end of the machine by a suitable stop retracting mechanism comprising a rock shaft 34 which is mounted in suitable bearings on the main frame 1 and has formed therein intermediate its ends a crank loop 35 which is adapted to engage the upper side of the spring plate 30 of the stop 2.8. 011 one end of the rock shaft 34 is an operating arm 36 which projects upwardly at right angles to the crank loop 35 and is adapted to be engaged by a trip lug 37 carried by a blade or knife projecting mechanism hereinafter described.

The operating mechanism for the knife or blade 4 comprises a carriage 38 in the form of a block; which is slidably mounted on a carriage supporting track 39 secured to one side of the machine, said block having in its outer side a longitudinal groove 40 with which is engaged an inwardly projecting guide flange 41 on the track 39 as shown. The knife or blade 4 is firmly secured to the block or carriage 38 by a laterally projecting arm or bar 42 which is secured to the knife and to the upper side of the block as shown. Secured to and projecting outwardly from the outer side of the block 38 is a wrist pin 43 which is connected by a pitman rod 44 to a wrist pin 45 which is eocentrically secured to a crank wheel 46 fixedly mounted on one end of the drive shaft 47 journaled in suitable bearings on this end of the frame 1 as shown. The crank wheel 46 may be driven in any suitable manner but is here shown and is preferably driven by a belt 48 which is engaged with a drive pulley 49 fixed on the shaft of a suitable motor not shown. By thus constructing and arranging the driving mechanism it will be seen that the block or carriage 38 will be retracted on its track and will in turn retract the plate or knife 4 at the proper time for cutting through the plastic material between the bottom of the hopper and the top of the mold thus separating the material in the mold from that in the hopper, said knife or plate remaining below the hopper until the filled mold has been ejected and the next empty mold brought into proper position for receiving a charge of material from the hopper, whereupon the knife or plate will be retracted thus permitting the empty mold to be filled from the hopper as will be readily understood In the forward movement of the carriage saidlug 37 will be brought into engagement with the upper end of the operating arm 36 and will thus rock the shaft 34 in the proper direction for engaging the crank loop therein with the spring stop projecting plate 30 thus retracting the stop 28 at the proper time to permit the filled mold to be ejected and the empty mold brought into place by the plunger operating weight as hereinbefore described. When the operating arm 36 is being actuated by the trip lug 37, said arm is also being sprung outwardly by the cam releasing lug arranged on the outer side of the track 39 so that as soon as the operating arm 36 has been tripped or shifted by the lug 37 to a sufiicient distance for retracting the stop 28, said arm will be disengaged from the trip lug by said releasing lug 50 thus permitting the spring plate 30 and the supplemental spring 31 to again project the stop 28 to an operative position.

Secured to the carriage 38 and depending therefrom is a combined plunger retracting and detent releasing arm 51 which when the carriage is brought back by the driving mechanism to retract the blade or knife 4 will engage the adjacent projecting end of the cross head 17 of the plunger frame thereby retracting said plunger frame and raising the weight 2 1 until said cross head is brought into position to be engaged by the detent 20, whereupon the plunger frame is held in a retracted position until said detent is released. The detent or pawl 20 as hereinbefore described is pivotally mounted on one side of the plunger track 12 and one end of said pawl or detent is extended and has formed thereon a weight whereby the opposite end of the pawl will always be held in position to drop in front of the lug 19 on the cross head 17 and thereby hold the latter and the plunger frame and weight in a retracted or operative position.

, The detent 20 is disengaged from the cross head of the plunger frame at the proper time by a suitable releasing mechanism comprising a rock shaft 52 which is mounted in suitable bearings on the frame of the machine and has therein at a suitable position a crank loop 53 which is engaged with the lower side of the weighted end of the pawl or detent 20 to release the same when the shaft is tripped or rocked. On the outer end of the shaft 52 is a crank arm 54 which is connected to one end of an operating bar 55 which is slidably supported in a suitable bracket 56 secured to one side of the frame. On the inner end of the bar 55 is an upwardly extending right angular trip lug 57 the inner end of which is disposed in the path of movement of the lower end of the plunger retracting arm 51 secured to the carriage 38, when the carriage has been brought to the end of its forward stroke or movement, and the knife or blade projected beneath the hopper, and when the stop retracting rock shaft 34: has been actuated to retract the stop 28 which holds the molds in place, and which when thus retracted permits the weight operated plunger to project the mold plates after the detent 20 is disengaged from the plunger. This disengage- "ment is accomplished by the arm 55 when engaged with the lug 57 on the operating bar 55 and thereby shifts said bar in the bracket 56 and causes the bar to rock the shaft 52 in the proper direction for bringing the crank loo-p 53 therein into engagement with said detent 20 to cause the disengagement thereof from the cross head of the plunger. After the arm 51 is disengaged from the lug 57 by the return movement of the carriage 38 the operating bar 55 and the rock shaft 52 will be restored to their normal position and the crank loop 53 in the shaft disengaged from the end of the pawl or detent 20 by a coiled spring 58 which is secured to the frame of the machine and to the crank arm 54: on the rock shaft 52 as shown.

Arranged on the top of the main frame or table 1 adjacent to the opposite side thereof from the shingle forming mechanism is a mold returning mechanism 59 which comprises a trough 60 extending longitudinally of and to the full length of the machine as shown. Revolubly mounted at one end of the trough 60 is a conveyer supporting roller 61 while at the opposite end of the trough is revolubly mounted a conveyer supporting and operating roller 62. Engaged with the rollers 61 and 62 and having its upper and lower surfaces arranged respectively -above and below the bottom of the trough 60 is an endless mold conveying belt 63 upon the upper stretch of which and in the trough 60 is laid the molds after being taken from the machine and having their contents emptied out onto a suitable support for drying. Vhen the molds are thus placed on the belt they are carried back to the opposite end of the trough and in position to be conveniently reached by the operator at this end of the machine who again places the molds in proper position on their tracks as shown. On the inn-er end of the combined belt supporting and operating roller 62 is fixedly mounted a driving pulley 64: which is connected by a belt 65 with a pulley 66 fixed on the inner end of the main drive shaft of the machine, whereby the belt for conveying the molds will be operated in the proper direction for carrying the empty molds back to the inlet end of the machine in the manner described.

While we have herein shown and described our invention as constructed for forming concrete or plastic shingles it is obvious that the same may be employed for forming artificial stones of various shapes and designs to be used for various purposes other notches 11 on the lower side of one end of the plate 7 are provided to permit the upper ends of the arms of the stop 28 to be projected upwardly to a slight extent so that before the filled mold is entirely ejected the upper ends of the fingers will be in position to catch and hold the empty mold in its proper position beneath the hopper thus preventing any possibility of the empty molds from being projected too far by their projecting mechanism. The notch 10 in the opposite end of the lower side of the plate 7 is provided to permit the plate 7 to pass freely over the mold projecting pawl 22 when the empty molds are placed in position in the tracks at the inlet end of the machine.

Having thus described our invention, what we claim is:

1. In a machine of the class described, a main supporting frame, mold supporting and guiding tracks mounted thereon, a hopper supported above said tracks, molds slidably mounted on the tracks, means to project said molds beneath the hopper, means for holding said projecting means in operative position, a slidably mounted support having a knife adapted to be projected be neath the hopper whereby the material deposited in the molds is separated from that remaining in the hopper, and a knife operating,mechanism, means operated by said knife support to release said holding means for the projecting means.

2. In a machine of the character described, a main supporting frame, mold supporting tracks arranged thereon, a hopper supported above said tracks, molds slidably supported on said tracks, a slidably support ed mold projecting plunger, a pawl carried by said plunger and adapted to engage the molds and project the same beneath the hopper, means to operate said plunger, a detent to hold the latter in an operative position, means to limit the forward movement of the molds and to hold the latter in position be neath the hopper, a knife supporting carriage, a knife secured thereto and adapted to be projected thereby beneath the hopper, whereby the material therein is separated from material deposited in the molds, a carriage operating mechanism, and means operated by said carriage to release said plunger detent and the stop mechanism of the molds.

3. In a machine of the character described, amain supporting frame, mold supporting tracks arranged thereon, a hopper supported above said tracks, molds slidably supported on said tracks, a slidably supported mold projecting plunger, a pawl carried by said plunger and adapted to engage the molds and project the same beneath the hopper, a. plunger operating weight, a cable to connect said weight with said plunger whereby the latter is actuated to project said molds, a detent to hold said plunge-r in an operative position, means whereby said detent is tripped to release the plunger and means whereby the latter is retracted and said weight raised after projecting the molds.

I. In a machine of the character described, a main supporting frame, mold supporting tracks arranged thereon, a hopper supported above said tracks, molds slidably supported on said tracks, a slidably supported mold projecting plunger, a pawl carried by said plunger and adapted to engage the molds and project the same beneath the hopper, a plunger operating weight, a cable to connect said weight with said plunger whereby the latter is actuated to project said molds, a detent to hold said plunger in an operative position, a slidably mounted knife supporting carriage, a knife carried thereby and adapted to be projected beneath said hopper to sever the material therein from that in the molds, a revolubly mounted crank wheel, a pitman rod to connect said wheel with said carriage whereby the latter and said knife are reciprocated, means secured to said carriage to engage and retract said plunger and to thereby raise said weight and means actuated by said carriage to trip said detent and thereby release said plunger and said weight whereby the plunger is projected.

5. In a machine of the character de-' scribed, a main supporting frame, mold supporting tracks arranged thereon, a hopper supported above said tracks, molds slidably supported on said tracks, a slidably supported mold projecting plunger, a pawl carried by said plunger and adapted to engage the molds and project the same beneath thehopper, a plunger operating weight, a cable to connect said weight with said plunger whereby the latter is actuated to project said molds, a detent to hold said plunger in an operative position, a slidably mounted knife supporting carriage, a knife carried thereby and adapted to be projected beneath said hopper to sever the material therein from that in the molds, means to reciprocate said carriage and said knife, a cross head on said plunger, an arm on said carriage and adapted to engage said cross head and thereby retract said plunger, a rock shaft having a crank loop to engage and trip said detentthereby releasing said plunger, a crank arm on said rock shaft, :1. spring retracted operating bar connected with said crank arm, a trip lug on said bar adapted to be engaged by the arm on said carriage whereby said operating bar is shifted to. actuate said rock shaft and thereby trip said detent and release said plunger and its operating Weight.

6. In a machine of the character described, a main supporting frame, mold supporting tracks arranged thereon, a hopper supported above said tracks, molds slidably supported on said tracks, a slidably supported mold projecting plunger, a pawl carried by said plunger and adapted to engage the molds and project the same beneath the hopper, a plunger operating weight, a cab-1e to connect said weight with said plunger whereby the latter is actuated to project said molds, a detent to hold said plunger in an operative position, a slidably mounted knife supporting carriage, a knife carried there-by and adapted to be projected beneath said hopper to sever the material therein from that in the molds, means'to reciprocate said carriage and said knife, means secured to said carriage to engage and retract said plunger and thereby raise said weight, means actuated by said carriage to trip said detent and thereby release said plunger and said weight, whereby the plunger is actuated to project said molds, a spring projected stop to limit the movement of and to hold said molds in an operative position beneath the hopper, a rock shaft having a crank loop to engage and retract said stop, an operating arm 011 said shaft, a trip lug on said carriage to opera-tively engage said arm and thereby retract said stop at the proper time and means to disengage said arm from said trip lug.

7.111 a machine of the character described, a main supporting frame, mold sup porting tracks arranged thereon, a hopper supported above said tracks, molds slidably supported on said tracks, a slidably supported plunger adapted to project said molds, means to project said plunger, a slidably supported carriage, a knife secured thereto and adapted to be projected between said hopper and molds, means on said carriage to retract said plunger, a revolubly mounted drive shaft, a crank wheel fixed thereon and connected with said carriage whereby the latter and said knife are reciprocated, a drive pulley connected with said crank wheel.

In testimony whereof we have hereunto Witnesses W. H. SKEMP, Jumps E. DIESEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington. D. C. 

